If Esav hadn't sold the bechora to Yaakov what, if anything, would have been different?
In other words, what consequence was there to the sale? What did it change, how did it make anything different?
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In Ezekiel 48, where he prophesied about a future temple, he talks about Kohanim and Levites serving. "Kohanim of the sons of Zadok..." or "Now for the Levites, opposite the border of the Kohanim..." ...

I have notcied that at my shul, whoever gives the siyum on the fast of the first-born each year before Pesach is always a first-born himself. Is this a generally practiced custom? I cannot imagine a ...

Assuming you follow the tradition that only first-born males are obligated to fast the day before Passover, do the males who have an older sister count as first-born or not?
Wikipedia doesn't seem to ...

Does someone who was a first born, but was born from a C-section have to fast on Ta'anis Bechoros?
The only source I know which addresses this is the Kaf HaChaim on Shulchan Aruch (470:3), who says ...

The Leviim wash the hands of the Kohanim when they go up to bless the people. If a Levi is not available a first born (to the mother) can wash (according to the Askenazi custom) instead, Orach Chaim ...

I'm interested in the question of whether a ger who is firstborn (of both parents, say, to keep things simple) must follow the rules for Ta'anit B'khorot. There are some remarks on the wikipedia page, ...

Stemming from this question about the seeming discrepancy between the number of people and the number of first-borns as counted in the beginning of Numbers:
I noticed this problem in my first reading ...

In the begining of sefer bamidbar, the males between 20 and 60 are counted and it says that there are over 600,000 of them. Theoretically each, or most, of these people should have had a first-born ...